Silvio,
On Wednesday 19 September 2007 13:59, S. Fricke wrote:
> how can i configure an "ext interrupt" to high-level? I want a interruption
> on IRQ2, but I checked with an oscilloscope that the pin has a low state
> and I needs a high state.
>
> I have tried, after I got the irq (with irq_of_parse_and_map), set it with
>
> set_irq_type(irq, IRQ_TYPE_LEVEL_HIGH);
>
> But I think it is a system-configuration (irq_desc) and no
> device-configuration.
Try with the attached patch.
Regards,
Juergen
--
Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de
Pengutronix - Linux Solutions for Science and Industry
Handelsregister: Amtsgericht Hildesheim, HRA 2686
Vertretung Sued/Muenchen, Germany
Phone: +49-8766-939 228 | Fax: +49-5121-206917-9
---
arch/powerpc/platforms/52xx/mpc52xx_pic.c | 38 ++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
Index: arch/powerpc/platforms/52xx/mpc52xx_pic.c
===================================================================
--- arch/powerpc/platforms/52xx/mpc52xx_pic.c.orig
+++ arch/powerpc/platforms/52xx/mpc52xx_pic.c
@@ -25,6 +25,7 @@
#include <linux/stddef.h>
#include <linux/delay.h>
#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <linux/hardirq.h>
#include <asm/io.h>
@@ -107,11 +108,48 @@ static void mpc52xx_extirq_ack(unsigned
io_be_setbit(&intr->ctrl, 27-l2irq);
}
+static int mpc52xx_extirq_set_type(unsigned int virq, unsigned int flow_type)
+{
+ u32 ctrl_reg, type;
+ int irq;
+ int l2irq;
+
+ irq = irq_map[virq].hwirq;
+ l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET;
+
+ pr_debug("%s: irq=%x. l2=%d flow_type=%d\n", __func__, irq, l2irq, flow_type);
+
+ switch (flow_type) {
+ case IRQF_TRIGGER_HIGH:
+ type = 0;
+ break;
+ case IRQF_TRIGGER_RISING:
+ type = 1;
+ break;
+ case IRQF_TRIGGER_FALLING:
+ type = 2;
+ break;
+ case IRQF_TRIGGER_LOW:
+ type = 3;
+ break;
+ default:
+ type = 0;
+ }
+
+ ctrl_reg = in_be32(&intr->ctrl);
+ ctrl_reg &= ~(0x3 << (22 - (l2irq * 2)));
+ ctrl_reg |= (type << (22 - (l2irq * 2)));
+ out_be32(&intr->ctrl, ctrl_reg);
+
+ return 0;
+}
+
static struct irq_chip mpc52xx_extirq_irqchip = {
.typename = " MPC52xx IRQ[0-3] ",
.mask = mpc52xx_extirq_mask,
.unmask = mpc52xx_extirq_unmask,
.ack = mpc52xx_extirq_ack,
+ .set_type = mpc52xx_extirq_set_type,
};
/*
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